What is "interrobang"

n. The symbol (lang und sc=Latinx '''‽''') (combination of ? and !).

The interrobang , also known as the interabang, ‽ (often represented by ?! or !?), is a nonstandard punctuation mark used in various written languages and intended to combine the functions of the question mark (also called the "interrogative point") and the exclamation mark or exclamation point (known in printers' and programmers' jargon as the "bang"). The glyph is a superimposition of these two marks. The word itself is an example of a portmanteau that incorporates an onomatopoeia.